From: Manish Rangankar Date: Fri, 23 Nov 2012 11:58:40 +0000 (-0500) Subject: [SCSI] qla4xxx: Fix memory corruption issue in qla4xxx_get_ep_fwdb. X-Git-Tag: next-20130218~72^2~61 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3dd4849c257af317cd33bcecf7d17b75dabf7540;p=karo-tx-linux.git [SCSI] qla4xxx: Fix memory corruption issue in qla4xxx_get_ep_fwdb. In qla4xxx_get_ep_fwdb(), dst_addr is of type struct sockaddr. We are copying sizeof(struct sockaddr_in6) bytes to dst_addr which is 12 bytes larger. This will cause memory corruption. So we change dst_addr to struct sockaddr_storage which is of 128 byte, large enough to hold sizeof(struct sockaddr_in6). Reported-by: Dan Carpenter Signed-off-by: Manish Rangankar Signed-off-by: Vikas Chaudhary Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c index 47b908cacd01..3a968168ca5a 100644 --- a/drivers/scsi/qla4xxx/ql4_os.c +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -4685,7 +4685,8 @@ static struct iscsi_endpoint *qla4xxx_get_ep_fwdb(struct scsi_qla_host *ha, struct iscsi_endpoint *ep; struct sockaddr_in *addr; struct sockaddr_in6 *addr6; - struct sockaddr *dst_addr; + struct sockaddr *t_addr; + struct sockaddr_storage *dst_addr; char *ip; /* TODO: need to destroy on unload iscsi_endpoint*/ @@ -4694,21 +4695,23 @@ static struct iscsi_endpoint *qla4xxx_get_ep_fwdb(struct scsi_qla_host *ha, return NULL; if (fw_ddb_entry->options & DDB_OPT_IPV6_DEVICE) { - dst_addr->sa_family = AF_INET6; + t_addr = (struct sockaddr *)dst_addr; + t_addr->sa_family = AF_INET6; addr6 = (struct sockaddr_in6 *)dst_addr; ip = (char *)&addr6->sin6_addr; memcpy(ip, fw_ddb_entry->ip_addr, IPv6_ADDR_LEN); addr6->sin6_port = htons(le16_to_cpu(fw_ddb_entry->port)); } else { - dst_addr->sa_family = AF_INET; + t_addr = (struct sockaddr *)dst_addr; + t_addr->sa_family = AF_INET; addr = (struct sockaddr_in *)dst_addr; ip = (char *)&addr->sin_addr; memcpy(ip, fw_ddb_entry->ip_addr, IP_ADDR_LEN); addr->sin_port = htons(le16_to_cpu(fw_ddb_entry->port)); } - ep = qla4xxx_ep_connect(ha->host, dst_addr, 0); + ep = qla4xxx_ep_connect(ha->host, (struct sockaddr *)dst_addr, 0); vfree(dst_addr); return ep; }